Get a Google Number.
Then you can give it out vs. your Cell Number. They can text you on it.
Of course, when you respond they will then have your cell number.
Plus you can forward your Google number to your office or to a Staff person when you are on vacation or just don't want to answer all the calls yourself!
Works great.
Actually, you can respond with your google voice number as well.
Problem with google voice texting is it doesn't support MMS. Wish it did, it would solve a big problem for me, but without it, there is a severe limitation for what I use texting for with business.
Dan